From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
To: Zhang Chen <chen.zhang@intel.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, Chao Gao <chao.gao@intel.com>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [RFC PATCH 3/9] KVM: x86: Add a kvm-only leaf for BHI_CTRL
Date: Wed, 14 Dec 2022 13:37:07 -0800 [thread overview]
Message-ID: <20221214213707.GC16072@ranerica-svr.sc.intel.com> (raw)
In-Reply-To: <20221210160046.2608762-4-chen.zhang@intel.com>
On Sun, Dec 11, 2022 at 12:00:40AM +0800, Zhang Chen wrote:
> KVM needs to check if guests can see BHI_CTRL. If a guest is using
> BHB-clearing sequence and cannot see BHI_CTRL and the host enumerates BHI,
> KVM is responsible for setting BHI_DIS_S for the guest.
>
> This allows VM migration from parts doesn't enumerate BHI to those
> that enumerate BHI.
Similar comment as in patch 2.
next prev parent reply other threads:[~2022-12-14 21:28 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-10 16:00 [RFC PATCH 0/9] Intel SPEC CTRL virtualization support Zhang Chen
2022-12-10 16:00 ` [RFC PATCH 1/9] x86/speculation: Introduce Intel SPEC_CTRL BHI related definition Zhang Chen
2022-12-10 16:00 ` [RFC PATCH 2/9] KVM: x86: Add a kvm-only leaf for RRSBA_CTRL Zhang Chen
2022-12-14 21:33 ` Ricardo Neri
2022-12-15 2:59 ` Zhang, Chen
2022-12-10 16:00 ` [RFC PATCH 3/9] KVM: x86: Add a kvm-only leaf for BHI_CTRL Zhang Chen
2022-12-14 21:37 ` Ricardo Neri [this message]
2022-12-10 16:00 ` [RFC PATCH 4/9] x86/kvm/vmx: Virtualize Intel IA32_SPEC_CTRL Zhang Chen
2022-12-10 16:00 ` [RFC PATCH 5/9] x86/bugs: Use Virtual MSRs to request hardware mitigations Zhang Chen
2022-12-12 20:23 ` Pawan Gupta
2022-12-14 7:57 ` Zhang, Chen
2022-12-14 20:18 ` Sean Christopherson
2022-12-19 13:56 ` Chao Gao
2022-12-19 17:14 ` Sean Christopherson
2022-12-20 13:43 ` Chao Gao
2022-12-22 18:31 ` Sean Christopherson
2023-01-10 9:26 ` Zhang, Chen
2022-12-10 16:00 ` [RFC PATCH 6/9] kvm/x86: Add ARCH_CAP_VIRTUAL_ENUM for guest MSR_IA32_ARCH_CAPABILITIES Zhang Chen
2022-12-21 4:03 ` Yang, Weijiang
2022-12-29 2:58 ` Zhang, Chen
2022-12-29 7:02 ` Yang, Weijiang
2022-12-29 7:41 ` Zhang, Chen
2022-12-29 8:38 ` Yang, Weijiang
2022-12-29 9:56 ` Zhang, Chen
2022-12-10 16:00 ` [RFC PATCH 7/9] kvm/x86: Add MSR_VIRTUAL_MITIGATION_ENUM/CTRL emulation Zhang Chen
2022-12-10 16:00 ` [RFC PATCH 8/9] x86/kvm/vmx: Initialize SPEC_CTRL MASK for RRSBA Zhang Chen
2023-01-15 14:20 ` Chao Gao
2022-12-10 16:00 ` [RFC PATCH 9/9] x86/kvm/vmx: Initialize SPEC_CTRL MASK for BHI Zhang Chen
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